Saw-tooth gage



C. 0.y HAWKSLEY AND 'W. J. BAUMANN.

APPLICAUON FILED JULY 14.71920.

Patented May 17,1921.

2 SHEETS-SHEET 1.

` UNITED ,STATES COLEMAN 0. HAWKSLEY AND WILLIAM J.

PATENT OFFICE Baci/reim, or rHrLADELPHIaiBENNsYL- vANrA. j

` sAw-TooTIrG-Aen.

To all whom t may concern.'

Be it' known that we, COLEMAN O. HAwKs- LEY and WILLIAM J. BAUMANN, citizens of thel United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in 'Saw-Tooth Gages, of which the following is a specication.

Our invention relates to a new and useful improvement in ,saw tooth gages, and is especially adapted for gaging the raler teeth of a cross cut saw, and has for its object to provide a simple and effective gage of this description which by one setting the raker teeth ofa cross cut saw may be'ile'd to the exact desired length prior to swaging or turning the edges thereofA outward longitudinally of the saw and also gaging said teeth after .the filingV operation to bring them to the exact predetermined length after swaging. v'

A further object of our invention is to provide a hardened plate through whichpthe raker teeth of a sawmay project while being filed and also to provide guides for preventingthe ile during the operation of filing thev raker teeth from undue sidewise movement. Y

With theseV ends in view, v this invention consists in the details of construction and combination `of elements vhereinafter set forth and .then specically designated by the claims.

In order that those skilled in the art to which this invention appertains, may under` stand how to make and use the same, we will describe its construction in detail, referring by numerals to the accompanying drawings forming a part of this application, in which Figure 1, is a perspective of a gage made in acccordance with our improvement.

Fig. 2, is a section on the line 2 2 of Fig. 1.

Fig. 3, is a side elevation ot' the vgage showing a portion of a cross cut saw in position thereon for filing and gaging the raker teeth.

Fig. 4, is a view similar to Fig. 3, showing the gage applied to the raler tooth of a cross cut saw when determining the length of the raker teeth after it has been swaged.

In carrying out our invention as here embodied, 1 represents the web or central member of the gage to which is secured in any specification of Letters Patent.

1920. Seriallol 396,190.y

suitable manner the topY plates 2 the inner endsof which are spaced apart a suiicient widthto permit the passage lot a file therebetween,Y for the purposeV Vhereinafter set forth. This web or central member also has secured thereto in any suitable manner the l two' bottom plates 3 the inner ends of which are likewisespaced apart for the purpose' which will hereafter appear.y

1- represents the .gage plate having formed.

` `1 jfaptented May 1 7, 1921.? Y

therewith or secured theretoI the supporting slide 5 which *isl fitted to slide between the ribs 6, said Vribs being formed with or secured to the web or vcentral member.

lThrough the central f portion of the webk are formed `two slotsy 7 through'which these.v clamping screws 8 pass, said'screwsthread- 1n into'the supporting slide therebyprovidlng for the vertical adjustment'ojl said ,slide and consequently the gage plate 4L.v

Upon the opposite end of vthe vertical slideV is lformed a gage prong 9 which projects downward between lthe bottom plates 3 l and serves as the second or final gage byf which the' length of the raker teeth isdetermined. v

From thel foregoing .description i the operation of our improvement willV bek ob.l

viouslyY as follows :e A Y v When theraker teeth of a sawlQ are to be trued and gagedA the saw is placedJ againstv one; face of the web or central member,

said plates having formed therewith"the ribs 11, 12 and 13 for properly positioning the saw relative to the slot 14 which is formed in the gage plate 4; so that onefoiil the raken' teeth 15 projects through said slot. When the raker teeth are in this position upon the gage as clearly shown in Fig. 3 their projecting edges may be readily filed lush with the gage plate, .the inner ends l of the top plates 2 serving as a guide to guide the file during this operation. When the raker teeth have been thus filed itis necessary to set their edges outward longitudinally of the saw blade and this is done' `by swaging the eXtreme ends of said teeth to give the proper incline, and to determine the amount lof this swaging the gage is reversed and the plates 3 brought in contact with the ends of the cutting teeth 16 of the height of the swaged edges of the raker teeth relative to the length of the cutting teeth 16.

Vthe saw when the prong 9 is utilized to gage Y As the gage plate 4L and gage prong 9 are to allintents and purposes one'piece the adjustment of the supporting slide 5 adjusts boththe gage plate and the gage prong 9 simultaneously so that there is no possibilityv of displacement between the gage plate and the gage prong, thus making the instrument highly accurate and eiiicient.v

While our improved gage may be made in any desired manner we prefer that the web or central member shall be an aluminum casting and that the plates 2 and 3 shall be attached thereto by the lugs 17, said plates being of hardened steel inV order that the contact of theteeth of the saw therewith cut saw, the combination of a web, two top plates secured to said web, the inner edges of said plates being spaced apart to form an access opening, two bottom plates also secured to said web their inner edges being spaced apart, a sliding support vadjustably secured to the web, a slotted gage plate carried by one end of said support, and a gage prong 35g carried by the other end of said support.

2. In a gage for the raker teeth of a cross Y Vcut saw, the combination of a web, two top plates secured to said web, the inner edges of said plates being spaced apart to form an access opening, two bottom plates also secured to said web their inner edges being spaced apart, a sliding support adjustably secured to the web, a slotted gage plate daryried by one end of said support, and ribs formed upon one face of the web kfor con: tacting with the face of the saw to properly locate the raker teeth relative to the slot in said gage plate. A

3. In a device of the character described,-

a web, guide ribs formed upon oneAface of said web, a sliding support fitted to move between said guide ribs to permit of adjustment relative to said web, means for holding said sliding support in any adjustment, a slotted gage plate carried by one end of the sliding support, a gage prong carried by the opposite end of said sliding support, two` top plates secured to the web their inner ends being spaced apart so as to give access to the gage plate and serve as a guide fora le, two bottom plates also secured to the web their inner edges being spaced apart so as to give access to the gage prong and positioning -the ribs formed upon one face of the web for contacting with the face of the saw.

4. In a device ofthe character described, a web having guide ribs formed upon one face thereof and positioning ribs formed upon the opposite face thereof, two pairs of plates, each pair being secured to the opposite edges of said ribs, the inner edges of saidk plates being spaced apart to form access openings, a support adapted to slider between the guide ribs, a slotted gage plate ,rigidly mounted upon one end of the support, a gage prong rigidly mounted upon the opposite end of said support, and means for adjusting the support in various positions upon the web. Y

In testimony whereof we have hereunto affixed our signatures. 1 Y

COLEMAN o. HAWKSLEY. WILLIAM J. BAUMANN. 

